Keystone designs and manufactures a range of filter cartridges and housings for the food and beverage, drinking water and chemical process markets in the U.S.

Keystone reported revenue of approximately $4 million in the year ended December 31, 2017. As part of this acquisition, the group has entered into a transition services agreement with CECO to transfer the business to its plant in Ashland, VA, over the next few months.